Surah Ash Shu'ara Tafseer

قَالَ رَبُّ السَّمَاوَاتِ وَالاْاَرْضِ وَمَا بَيْنَهُمَا

(Musa) said:"The Lord of the heavens and the earth, and all that is between them..."

meaning, the Creator, Sovereign and Controller of all that, their God Who has no partner or associate. He is the One Who has created all things. He knows the higher realms and the heavenly bodies that are in them, both those that are stationary and those that move and shine brightly. He knows the lower realms and what is in them; the oceans, continents, mountains, trees, animals, plants and fruits. He knows what is in between the two realms; the winds, birds, and whatever is in the air. All of them are servants to Him, submitting and humbling themselves before Him.

إن كُنتُم مُّوقِنِينَ

if you seek to be convinced with certainty.

means, if you have believing hearts and clear insight